In the first part, Naruto and Sasuke are still little kids. One day Sasuke runs into Itachi and Naruto - Naruto sits between Itachi's legs while the older Uchiha combs the fox's ruffled fur. Upon seeing this, Sasuke runs away. It is Itachi who persuades Naruto to run after Sasuke, but when he finally catches up with the younger Uchiha, Sasuke finds there's something very irritating about the blond. Wonder what it is?In the second part, Naruto is very worried about the fact that Sasuke and he don't belong to the same species.